Home / 91,178.40-136,782-38,588.16

Finding the Fourth Proportional to 91,178.40, 136,782 and 38,588.16

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Solution

The fourth proportional to 91,178.40, 136,782 and 38,588.16 is: 57,888.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,178.40 : 136,782 = 38,588.16 : x
  2. Step 2: Convert to fraction form
    91,178.40/136,782 = 38,588.16/x
  3. Step 3: Cross multiply
    91,178.40x = 136,782 × 38,588.16
  4. Step 4: Simplify right side
    91,178.40x = 5,278,165,701.12
  5. Step 5: Solve for x
    x = 5,278,165,701.12/91,178.40
  6. Step 6: Final answer
    x = 57,888.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.